D.C. Weighs Sales Tax on Medical Marijuana June 2, 2010 Joseph Bishop-Henchman Joseph Bishop-Henchman Washington, D.C. officials estimated yesterday that extending the city’s 6% sales tax to medical marijuana could generate $400,000 over five years. Specifically, the office guessed that about 850 people would fill prescriptions at an average price of $350 apiece, for a tax of $21. In November, Californians will vote on whether to legalize and tax marijuana. Stay informed on the tax policies impacting you. Subscribe to get insights from our trusted experts delivered straight to your inbox. Subscribe Share Tweet Share Email Topics Center for State Tax Policy California The District of Columbia Cannabis Taxes Excise Taxes Individual and Consumption Taxes